Your network contains an Exchange Server 2010 server.
You need to prevent a user named User1 from downloading attachments larger than 50 KB when using Exchange ActiveSync. Your solution must not affect other users.
What should you do first?
A. Create a new ActiveSync Device Access rule.
B. Create a new Exchange ActiveSync Mailbox policy.
C. Modify the properties of User1’s mailbox.
D. Modify the properties of the default Exchange ActiveSync Mailbox policy.
